There are many sources you may want to browse if you need ideas for a paper topic. Some places you might find "hot topics" are:
Lexis+
Westlaw
Blawgs (legal blogs) can also be great sources of inspiration if you have a general sense of your area of interest.
Selected blogs can be searched on Westlaw and Lexis.
Blawg directories can help you identify which cover particular topics, as well as when and how often they are generally updated.
Legal News
Popular News